ScientificWorkflows Applied to the Coupling of a Continuum(Elmer v8.3) and a Discrete Element (HiDEM v1.0) Ice DynamicModel

Abstract. Scientific computing applications involving complex simulations and data-intensive processing are often composed of multiple tasks forming a workflow of computing jobs. Scientific communities running such applications on distributed and heterogeneous computing resources find it cumbersome to manage and monitor the execution of these tasks. Scientific workflow management systems (WMS) can be used to automate and simplify complex task structures by providing tooling for the composition and execution of workflows across distributed and heterogeneous computing environments. As a case study, we apply the UNICORE workflow management system to a formerly hard-coded coupling of a glacier sliding and calving simulation that contains many tasks and dependencies, ranging from pre-processing and data management to repetitive executions in heterogeneous high-performance computing (HPC) resource environments. Using the UNICORE workflow management system, the composition, management, and execution of the glacier modelling workflow becomes easier with respect to usage, monitoring, maintenance, re-usability, portability, and reproducibility in different environments and by different user groups.